Double rotary jet pump



July 15, i952 w. J. coNERY 2,603,157

DOUBLE ROTARY JET PUMP Filed Sept. '7, 1948 2 S-lEETS-SHEET 1 DOUBLEROTARY JET PUMP Filed sept. 7, 1948 2 SHEETS-SHEET 2 5 o s'. l IE] El I9 J INVENTOR WILLIAM J- CNERY BY .'Jarmlr f .7W

Patented July 15, 1952 UNITED STATES DOUBLE ROTARY JET PUMP William J.Conery, Ashland, Ohio, assignor to The F. E. Myers & Bro. Co., Ashland,Ohio, a

corporation of Ohio Application September 7, 1948,-Serial No. 47,984

3 Claims. (Ol. 10S-5) The present invention relates to pumps and isconcerned primarily with a double rotary jet pump.

At the present time the use of jet pumps for raising water out of wellsis widespread; Such a pump operates on the principle of building uppressure on a stream of water that is directed downwardly to a desiredlevel within thewell, whereupon it is expelled through a nozzle thatcooperates with a venturi, whereupon water from the well is entrainedand carried upwardly in a return pipe.

Jet pumps operating on this general principle are well known andextensively used. However, the present invention proposes certainimprovements in a pump oi this type with practical advantages attachingthereto.

The presence of air in a pump of this type has been a disturbing factor.It is desirable to pump air from the discharge side of the pump into awater tank, because air under pressure in the tank is a desirable andnecessary element. Hown ever, the presence of air in the lines to thejet in the well is extremely undesirable.

To the end of properly controlling this factor there have been lproposedvarious arrangements of air separation chambersA However, as yet none ofthese chambers have proven completely satisfactory in eliminating air inthe system to the jet in the well and at the same time providing air onthe discharge side.

The present invention has in view as its foremost objective theprovision of a dual pump assembly comprising a discharge pump at oneside and a jet supply pump on the other,v the two being driven from acommon power source such as an electric motor. An air separation chamberis so associated with these pumps that it is on the suction sides ofboth pumps. By so locating the air separation chamber provision is madefor drawing substantially all the air ytherefrom off to the dischargepump and thence to the water tank, while the water which is forced downto the jet in the well is substantially free of air.

More in detail, the invention has as an object the provision of a dualpump of the type indicated which includes a discharge pump at one endand a jet supply pump assembly at the other. Associated with this jetsupply pump assembly is an air separation chamber. A conduit connectsthis separation chamber with the suction side of the discharge pump,while another port provides communication with the suction side of thejet supply pump.

As above explained the optimum condition which may be achieved is whenall of the air from the air separation chamber is pumped over to thedischarge pump.

With this thought in mind, another object of the invention is theprovision of a pump assembly of the character aforesaid, in which theair separation chamber is formed with a port at its uppermost point, andto which port is connected the conduit leading to the discharge pump.The location of this connection at the top has proven to be extremelyeffective in providing the transfer of air in the manner intended.

Still another object of the invention is the provision of a dual pumpassembly of the type above noted in which the return line from the jetinthe well is connected to the air separation chamber at a port in closeproximity to the port at the top which communicates with the pump on thedischarge side. This, arrangement further enhances theseparating actionin the air separation chamber so as to insure that practically nothingbut water goes down to the jet in the well with all the air being pumpedover to the discharge pump.

Various other more detailed objects and advantages of the invention suchas arise in connection with carrying out the above noted ideas in apractical embodiment will in part become apparent and'partly hereinafterstated as the description of the invention proceeds.

The invention, therefore, comprises a dual pump assembly comprising adischarge pump, a jet supply pump, power means for driving both ofsaidpumps, an air separation chamber on the suction sides of both pumps andformed with a rport at the top establishing communication between theair separation chamber and the discharge pump. The return line from thejet in the well is connected tothe air separation chamber in closeproximity to this port that communicates with the discharge pump.

For a full and more completeunderstanding of the invention reference maybe had to the iollowing description and accompanying drawings wherein:

Figure l is a side view mostly in elevation but with parts broken awayand shown in section of a dual pump assembly designed in accordance withthe precepts of rthis invention;

Figure 2 is a view in end elevation of the pump shown in Figure llooking at the right hand end thereof;

Figure 3 is a view similar to Figure 1 in that it isv partly inelevation and partly in section of one modification;

Figure 4 is a view of an end elevation of the pump shown in Figure 3;

Figure 5 is another side view partly in elevation and partly in sectionof still another modification; and

Figure 6 is an end elevation of the pump shown in Figure 5.

Preferred embodiment Referring now to the drawings wherein likereference characters denote corresponding parts, and first moreparticularly to Figures 1 and 2I a preferred embodiment of the inventionwill be described.

A base is represented at IQ and this base is adapted to rest on anyappropriate supporting surface. Upstanding from the base i6 is a piede"-tal which carries a casing |2 which houses an electricmotor representedat I3. The particular type of motor employed is not a part of thisinvention and any of the known motors which will accomplish the workrequired of it will prove to be adequate.

The motor I3 includes a drive shaft I4 which projects outwardly fromeach side thereof and from which power is taken in driving the pumps nowto be described.

Speaking with reference to the showing in Figure 1, mounted on the lefthand side of the casing I2 is a discharge pump assembly which isreferred to in its entirety by the reference character D. This pumpassembly D consists of the following elements:

The casing I2 includes an end wall I5 having an offset portion I6 thatis deformed in the di rection of the motor I3 to provide a conical wallsection I 'I that terminates at its smaller end in a flat I8 formed withan opening which receives one end of the motor shaft I4. It will benoted that the offset portion I6 is of a thickened construction and isprovided with a plurality of ports I9 for apuinp to be later described.

Secured to this wall section I1 in any preferred manner, such as by thefastening elements indicated at 26, is a conical plate 2| having aflange 22 which overlies and is secured to the wall section Il by thefasteners 2i). The smaller end of this conical plate terminates in atube 23 having an inwardly extending frange or lip 24. It will beevident that the conical wall and conical plate 2| cooperate to define achamber 25 which is identified as the impeller chamber.

A centrifugal impeller 23 is rotatably mounted in the chamber 25. Itwill be noted that this impeller 23 includes a central hub portion 21 towhich the end of the shaft I4 is anchored and a tubular hub 28 isreceived in the flange 24. The main body of the impeller 26 is formedwith passages 29 that communicate with the bore of the hub 28 and tube23. A seal of a type that is well known in this art is shown at 3D andis included for the purpose of preventing water from leaking out of thechamber along the shaft |4.

An end casing member 3| may be mounted on the end of the'casing I2 inany preferred marmer such as by being bolted thereto (not illustrated)This end casing member 3| is formed with an inner ring-like wall 32which is fitted the annular groove defined by wall sections l5 and i5 ofthe casing l2. The end casing 3i defines a discharge chamber 33 whichcommunicates with the passages I 9. The casing 3| is formed with a port34 to which is connected a conduit 35 that extends to a water tank thatis to be filled with water under air pressure.

Extending inwardly from the curved end wall of the casing 3| and intothe chamber 33 is a tubular stub 36 the end face of which is formed withan annular groove 3l which receives the end of the tube 23.Communicating with the tubular stub 36 is a threaded port 38 into whichis threaded a tting 39. It is evident that this fitting 33 communicatesthrough the tubular stub 36, tube 23, and member 28 with the suctionside of the impeller 26.

Referring now more particularly to the right hand side of Figure 1, ajet supply pump is shown vas attached to that end of the casing I 2, and

this jet supply pump is referred to in its entirety by the referencecharacter J. The casing I2 carries a wall structure which is a duplicateof that described at the discharge pump D. It is believed to beunnecessary to here repeat the details of this construction. It suilicesto point out that an impeller 40 is rotatably mounted in an impellerchamber 4| on one end of the motor drive shaft |4. The impeller 40includes passages 42, while passages 43 communicate with the impellerchamber 4|.

An end casing member defined by a cylindrical wall 44 and a curved endwall 45 which is integrally joined to the wall 44, is mounted on thecasing I2 in a manner corresponding to the mounting of the casing 3|.This end casing member also includes a vertical partition 46 thatextends downwardly from the cylindrical wall 44 to which it isintegrally connected with a horizontal partition 4'! integrally joiningthe inner edge of the vertical partition 46 with the curved wall 45.This vertical partition 46 is formed with a port at 48 that communicateswith the suction side of the impeller 40. The partitions 46 and 41,cylindrical wall 44, and end wall 45, together define an air separationchamber 43 and a baille 50 extends inwardly into the chamber 49 from thepartition 45 with which it is integrally formed.

At the uppermost point of the chamber 49 the cylindrical wall 44 isformed with a threaded port 5| into which is screwed a fitting 52. Aconduit 53 connects with fittings 39 and 52. In close proximity to thisthreaded port 5| the wall of the chamber 48 is formed with another port54 to which is connected a conduit 55 which constitutes the return sideof a jet system that eX- tends down into a well.

Such jet systems are well known and a conventional type has been shownin Fig. 1 for connection 'to the conduits 55 and 58. It suflices topoint out that the water is returned from the well by the jet at theport 54 where it is introduced into the air separation chamber 43.

The end casing 44 also defines a pressure chamber 56 with which thepassages 43 communicate. This chamber 56 is formed with a port 51 towhich a conduit 58 is connected. The conduit 58 is a part of the jetsystem and extends down into the well.

The partition 46 is formed with a vent port at 5 which will evacuate anyair which might accumulate in the pressure chamber 56 and permit suchair to pass to the air separation chamber 4S.

Operation In outlining the operation of the mechanism above described,it will be assumed that the motor I3 drives the motor shaft I4. Thisrotates the impellers 26 and 4S on the opposite ends thereof. As theimpeller is rotated water is drawn from the air separation chamber 49through the port 48 into the suction side of the impeller 40. As thelatter rotates the water is expelled under increased pressure throughthe passages 42 and 43 into the pressure chamber 55. The pressure whichhas been built up on the water forces it through the port 51 into theconduit 58 and thence down into the jet in the well. The nozzle of thejet cooperates with a venturi and as the water is expelled from thenozzle it entrains water from the well and this combined water iscarried upwardly through the return pipe from which it is introducedthrough the port 54 into the air separation chamber 49. As much Water asis required to operate the jet system will then be again taken throughthe cycle that is just described. However, the additional water which ispicked up by the jet in the Well, together with any air which may bepresent in the air separation chamber, is drawn through the port 5l intothe fitting 52 and through the conduit 53 over to the fitting 39 fromwhich it passes into the suction side of the impeller 2B.

It is to be remembered that the latter is continuously rotating andcreates the suction which will draw the water and air over from the airseparation chamber 49. Ihe impeller 26 forces the water under increasedpressure out through the 1 passages 29 and I9 into the discharge chamber33. From the latter Water passes through port 34 and conduit 35 to thewater tank (not illustrated).y

An appreciable amount of air will be entrained in this water, but thisis a highly desirable factor on the discharge side because it isnecessary that the tank include air under pressure so as to properlyexpel the water therefrom as it is to be used.

It will be noted that the double rotary pump assembly above describedembodies the following novel characteristic features:

(a) The air separation chamber 49 is on the suction side of both theimpellers 26 and 48.

(b) The port 5! which establishes communication between the airseparation chamber and the impeller 25 of the discharge pump is at thetop of the air separation chamber.

(c) The port 54 is in close proximity to the port 5I.

The above noted features cooperate with the baffle 50 to provide for ahighly efficient separation of the air from the water. Substantially allthe air passes out through the port 5|, while possibly nothing but waterpasses through the port 48 to the jet supply pump impeller 40.

First modification Referring now more particularly to Figures 3 and 4, asomewhat modified form of the invention will be described.

In this form of the invention both the discharge and jet supply pumpsare located at the same end of the motor shaft. The electric motor vI 3is shown as mounted on the usual base lf3 and has a drive shaft 59projecting outwardly from one end thereof. Secured to the motor casingin any preferred manner, such as by the bolts shown at 60, is acylindrical pump casing 6l having end flanges 62 and 63. This casing 6lcarries a p-artition 84 of the irregular formation illustrated in Figure3 and which partition is preferably integrally joined to the cylindricalwall of the casing. This partition 64 is formed with a central port 65.

The partition 64, together with the cylindrical Wall BI and the end Wallof the motor casing define an air separation chamber 66. A baffle 61 iscarried by the partition 64 and is formed with an opening through whichthe shaft 59 passes. It will be noted that this baflie 61 shields theopening 65. The cylindrical casing 6l is formed with a port 68 at thetop of the air separation chamber 66. A fitting 69 is screwed into thisport. The cylindrical wall 6| is also formed with another port 10 inclose proximity to the port 68 and with which communicates a conduit 1|that is connected to the return side of the jet system in the well.

Enclosed Within the end flange 63 is a dividing `plate 12 which,together with the partition 64,

defines a pressure chamber 13. A vent port 8 is formed in the partition64 to evacuate any air which might accumulate in the pressure chamber 13to the air separation chamber 65. The cylindrical casing 6l is formedwith a port at 14 which communicates with the pressure chamber13 and towhich is connected a conduit 15 that is on the pressure side of the jetsystem in l the well. Y

The shaft 59 passes through an opening in the plate 12 and between thepartition 54 and plate 12 carries a centrifugal impeller 16. The latteris mounted in a chamber 11 that is defined by the dividing plate 12 anda conical plate 18. Ports 19 establish communication between theimpeller chamber 11 and pressure chamber 13. The impeller 15 may beidentified as the jet supply pump because it is the impeller whichprovides the necessary pressure on the water going to the jet system inthe well.

An end casing member made up of a cylindrical Wall 89 and a somewhatirregular shaped curved wall 8| is mounted on the end of the casing 6Ihaving a ring-like end flange 82 which abuts the ange B3 and to which itmay be connected in any preferred manner. This end casing 8| carries apartition 83 which marks off on one side a discharge chamber 84 and onthe other side an inlet chamber 85. This partition 83 is formed with aport 85 that communicates with the inlet chamber 85 and yalso thesuction side of a centrifugal impeller 81. The latter is mounted in animpeller chamber 88 on the end ofv the shaft 59. The impeller chamber881s dened by a dividing plate 12 and a conical plate 89. Passages 99communicate between the impeller chamber 88 and thedischarge chamber 84.The cylindrical Wall is formed with a threaded port 9i that communicateswith the discharge chamber 84 and to which is connected a conduit 92that extends to a water tank (not illustrated) Another threaded port 93communicatesk with the inlet chamber and a fitting 94 is screwed intothis port. A cordlt 95 is connected between the fittings 69 an Operationfirst modification While the operation of the modification shown inFigures 3 and 4 is substantially the same as that for the form-shown inFigures 1 and 2, it may be brieily described by noting that as the motordrives the shaft 59 both the impellers 15 and 81 are rotated. Theimpeller 18 draws in water through the port 65 fronithe air separationchamber 56 and builds up pressure on this water. The water is forcedthrough port 14 into pipe 15 and thence down to the jet system in thewell. The jet pump entrains water from the well which, together with thewater from the jet supchamber 85 through port 89 into theimpeller. A

The impeller builds up pressure on the water as it is transferred to thedischarge chamber 84 from which it passes through port 9| and conduit 92to the water tank.

Again it is noted that the pump described embraces the following novelfeatures which are characteristic of this invention:

(a) Air separation chamber 66 is on the suction sides of both theimpellers T6 and 81.

(b) Port G8 is at the top of the air separation chamber 66.

(c) Port I is in close proximity to the port 68. These features combineto cooperate with the baille 61 in insuring that only water goes to thejet system with substantially all the air being drawn to the dischargeside with the water.

Second modification Referring now to Figures 5 and 6, a second modifiedform of the invention will be described. The motor I3 is mounted on itsbase I0 in the usual manner and provides a motor drive shaft 96.

lThe motor casing which is represented at I2 has substantially the sameconstruction as either end of the motor casing described in connectionwith Figures l and 2.

It suffices to point out that the end wall of this casing, together witha conical plate 97, define an an ilnpeller chamber 98 in which rota-tesan impeller 99 that is drivably mounted on the shaft 96. A cylindricalcasing lili! has an end flange IUI which abuts the end flange l5 on thecasing |2 and to which it is secured in any preferred manner.

rlhe cylindrical casing 05) carries an irregularly shaped partitionItwhich, together with an end wall |03, denes an air separation chamber|04.

The cylindrical 4wall It is formed with a port |35 which communicateswith the chamber |04 and with which communicates a conduit |06 on thereturn side of the jet system. The partition |02 is formed with anopening |01! through which the shaft 96 passes and which also acts asthe means of communication between the air separation chamber |94 andthe suction side of the impeller 99. The end wall |93 is formed withanother opening |69 through which the shaft 96 passes and which alsoacts as a means of communication between the air separation chamber I0@and a second impeller to be later described.

The partition |02, together with the cylindrical casing |00, denne apressure chamber |09. A vent port 'I is formed in partition |02 toevacuate any air which might accumulate in the pressure chamber |09 tothe air separation chamber Ili. rihe cylindrical wall |00 is formed-with a port IIB which communicates with the pressure chamber |09 and towhich is connected a conduct that goes to the pressure side of the jetsystem. Passages ||2 establish communication between the impellerchamber 93 and the pressure chamber |99.

The cylindrical `casing |00 is continued be- 8 yond the end Wall |03 anappreciable distance where it is formed with an in-turned end ange |I3.Mounted on this end flange ||3 is an end closure member III having acentral conical wall section ||5 terminating in a at IIS. A conicalplate II'I is anchored to this end closure member ||4 and has a tubularextension ||8 that is imbedded in the end wall |03. The plate I 'I andwall sections ||5 and I6 together deine an impeller chamber ||9. Thecasing |00, together with the end flange ||3 and plate II'I, denne adischarge chamber |20. Radial passages |2| communicate between theimpeller chamber H9 and discharge chamber |20. The motor shaft 95projects into the impeller chamber ||9 and an impeller |22 is drivablymounted thereon for rotation in the impeller chamber. The port |08 inthe end wallvv |03 establishes communication between the suction side ofthe impeller |22 and the air separation chamber IEII'I.` The casing |00is formed with a threaded port at |23 that communicates with thedischarge chamber |20 and to which is connected a conduit |24 thatextends to the water tank.

Operation second modification The operation of the form of the inventiondepicted in Figures 5 and 6 is substantially the same as that abovedescribed in connection with the other two forms. It may be brieflyoutlined by noting that as the motor shaft 96 rotates both impellers 99and |22 are driven. rihe impeller 99 draws water from the separationchamber |04 through the opening |01. As the impeller operates waterunder increased pressure is expelled through passages I|2 into thepressure chamber |09. VThe water under pressure is forced through portIIG into pipe and thence down into the jet system. The nozzlecooperating with the Venturi entrains additional water from the well andthis water is introduced into the air separation chamber |04 through thereturn pipe |06 and port |05. As much water as is used in the jet systemis now returned to this cycle which is repeated. The water which ispicked up from the well, together with any air, is drawn through theopening |08 by the impeller |22. The latter builds up pressure on thewater and air which is expelled through passages |2| into the dischargechamber |20. From the latter the water passes through port |23 andconduit |24 to the water tank.

The pump illustrated in Figures 5 and 6 embraces the novelcharacteristic feature of having the air separation chamber |94 on thesuction side of both the impellers 99 and |22. This insures of efcientseparation of the air so that substantially nothing but Water goes downto the jet system.

While preferred specific embodiments of the invention are hereinbeforeset forth, it is to be clearly understood that the invention is not tobe limited to the exact constructions, mechanisms, and devicesillustrated and described, because various modifications of thesedetails may be provided in putting the invention into practice withinthe purview of the appended claims.

I claim:

l.. A pumping apparatus for water wells, said apparatusincluding a jetpump positioned in the well to entrain the water therefrom, incombination, a driving device with a horizontal shaft, a jet supply pumpfor activating the jet and a discharge supply pump for deliveringservice water under pressure, said supply pumps being contained in thesame housing and include impellers mounted on said shaft, said impellershaving centrally disposed suction openings and peripherally disposeddischarge openings, an air separating chamber formed within the samehousing as the jet supply and discharge supply pumps, but separated fromthe discharge supply pump, said chamber communicating with the suctionopening of the jet supply pump, the top portion of said chamber beingpositioned above the last mentioned suction opening and adapted tocollect separated air, a suction pipe from said jet pump entering saidchamber at the top portion thereof, and a conduit extending from thechamber near said suction pipe to the suction opening of the dischargesupply pump whereby the air separating chamber is in communication withsaid last mentioned suction opening, discharge chambers surrounding saidimpellers and communicating with the peripherally disposed dischargeopenings thereof, and pressure discharge pipes extending respectivelyfrom said discharge chambers, said jet supply pump communicating withthe jet pump in the well.

2. A pumping apparatus for Water wells, said apparatus including a jetpump positioned in the well to entrain the water therefrom, incombination, a driving device with a horizontal shaft, a jet supply pumpfor activating the jet, and a discharge supply pump for deliveringservice water under pressure, said supply pumps being contained in thesame housing and include impellers mounted on said shaft at oppositesides of said driving device, said impellers having centrally disposedsuction openings presented away from said driving device, and havingperipherally disposed discharge openings presented radially outward withrespect to said device, an air separating chamber formed within the samehousing as the jet supply and discharge supply pumps, but separated fromthe discharge supply pump, said chamber communicating with the suctionopening of the jet supply pump, the top portion of said chamber beingpositioned above the last mentioned suction opening and adapted tocollect separated air, a suction pipe from said jet pump entering saidchamber at said top portion thereof, and a conduit extending from thechamber near said suction pipe to the suction opening of the dischargesupply pump, whereby the air separating chamber and the body ofseparated air at the top of the chamber are in communication with saidlast mentioned suction opening, a discharge chamber surrounding saidimpellers to receive the discharge from the peripherally disposedopenings thereof, a pressure discharge pipe extending from the lowerportion of the discharge chamber of the jet supply pump andcommunicating with the jet pump in the well, and a pressure dischargepipe extending from the upper portion of the discharge chamber of thedischarge supply pump,

3. A pumping apparatus for water wells, said apparatus including a jetpump positioned in the well to entrain the water therefrom, incombination, a driving device with a horizontal shaft, a jet supply pumpfor activating the jet of said jet pump, a discharge supply pump fordelivering service waterunder pressure, said supply pumps beingcontained in the same housing and include impellers mounted on saidshaft, said impellers having centrally disposed suction openings andperipherally disposed discharge openings, an air separating chamberformed within the same housing as the jet supply and discharge supplypumps but separated from the discharge supply pump, said chambercommunicating with the suction opening of the jet supply pump, saidchamber being positioned substantially entirely above the lower edge ofthe suction opening of the jet supply pump, whereby the top of thechamber is positioned above the last mentioned f suction opening and isadapted to collect separated air at a position remote from said suctionopening, a suction pipe from said jet pump entering said chamber at thetop portion thereof, a conduit extending from the top of said chamber tothe suction opening of the discharge supply` pump whereby the airseparating chamber is in communication with said last mentioned suctionopening, discharge chambers surrounding said impellers and communicatingwith the peripherally disposed discharge openings thereof, a pressurepipe extending from the lower portion of the discharge chamber of thejet supply pump and communicating with the jet pump in the well, and apressure discharge pipe to a service tank extending from the upperportion of the discharge chamber of the discharge supply pump.

WILLIAM J. CONERY.

REFERENCES CITED The following references are of record in the nie ofthis patent:

Great Britain 1932

